This update for opi fixes the following issues:

- Version 4.1.0

  * Add support for Slowroll
  * Replace $releasever also with ${releasever} syntax
  * Update changelog prefix to *

- Version 4.0.0

  * Simplify rpmbuild by removing %install
  * Add opi new dependencies to testsuite: rpm-build, squashfs
  * Rename rpmbuild internal dirs to uppercase
  * Fix building RPMs for Leap 15.5
  * Update opi-proxy .service file to listen on IPv6 as well
  * Add Snap library and Spotify plugin
  * Allow installing non-rpm applications (add OrcaSlicer)
  * chore: update multi_install description
  * Indent changes in changelog further than version

- Version 3.6.0

  * Fix repo URL generation for MicroOS and Leap Micro (fixes #158)
  * Add multi package option
  * Add ocenaudio audio editor (fixes #155)
  * Ignore gpg check for unsigned pkgs (or pkgs without published key)